Im about to bore out a 276 carb to 1& 1/16 for my Ariel .........question is ,can I simply bore out the jet block/slide guide assy as one piece ? ....or do I have to unsolder the lower part ,so that the short tube on the jetblock is unchanged ?...........Unsoldering/resoldering could be tricky so as not to block or obstruct any of the passages or jets...............I see lots of horribly bodged Amals about,seemingly enlarged with coarse sandpaper wrapped around a stick,but they are never attached to engines ..............which Id assume is because they dont work anymore.